Power-driven tool



March 9 c. s. SCHLENZIG 2,372,125

POWER DRIVEN TOOL Filed Oct. 26, 1944 Patented Mar. 20, 1945 j UNITED STATES PATENT OFFICE POWER-DRIVEN TOOL can s. Schlenzig, Upper Darby, Pa. Application October 26, 1944, Serial No. 560,397 5 Claims, 11. 51"16.6)

{This invention relates to a power driven tool, more specifically adapted to use in the finishing of metal stampings and the like as by grinding,

I polishing and the like.

The tool in accordance with this invention, in its practical adaptation, affords duplicate facilities for a plurality of operations, as in the finishing of metal stampings, the duplicate facilities being driven from a single source of power and at the same time being independently controllable I by the operators which they respectively serve.

The tool in accordance with this invention has been found admirably adapted in practice for the finishing of metal stampings, such as airplane structural elements which require as a final operation the smoothing of cut edges, the removal of burrs and polishing. As will appear many other uses for the tool will be obvious.

. Broadly speaking the tool according to this invention, comprises a. table provided .at intervals traveling beneath the table under the drive of a singlesource of power, as an electric motor positioned adjacent one end of the table.'

The spindles are equipped withsprings tending to turn them on their pivotal mountings so that.

their, cylindrical or pulley sections will engage the belt so that the spindles will be rotated. The degree of power applied to the spindles, however, willdepend upon the pressure applied byan operin spaced groups, as, for example, pairs, permitting access for an operator to each group, Where the respective operators perform a plurality of operations requiring different means,

' as a grinding wheel and a polishing device.

Where rows of spindles are provided on opposite sides of the table, it is contemplated that the table will be longitudinally slotted between the rows of spindles and an air duct provided beneath the table into which the slot opens for the constant removal, under the influence of a suction device, as a fan, of dust created by the operations.

Having now indicated in a general way the nature and purpose of this invention, I will prodetail of construction.

In the several figures, 1 indicates a table,which may be of any length, and which is desirably provided at its longitudinal edges with depending members 2 which, as will be seen, serve as guards.

, one end with the intake side of a blower or fan,

ator, through the work, to the grinding orpolishing means carried by the spindles.

The slots in the table will be of length to permit the pulley sections of the spindles to be pressed freely against thebelt by an operator, of a length to permitan operator to disengage them from the belt, usually against the springs, and of a width to permit the arcuate movement resultant from the pivotal mounting of the spindles. Preferably, though not necessarily, the slots will be arcuate and will be provided with a notch or enlarged at their outer ends for engagement of opposite sides of the table spaced to provide access for an operator to each of them, or arranged not shown. I

Adjacent its longitudinal edges the table is provided with longitudinally spaced slots 5, which, as shown, are preferably arcuate and terminate at their outer ends in enlarged portions 6.

Beneath the table I on opposite sides of the duct 4 are a pair of supports, each comprising, as shown, a pair of vertically spaced parallel pipes, 1, 1

Clamped to the supports at spaced intervals and on a vertical axis are guide pulleys 8, 8. The pulleys 8, 8 are, preferably, respectively positioned adjacent to the'inner ends of the slots member H, on the upper end of which is pivotally mounted on an arm l2. Secured to each of the arms I2 is a vertically extending spindle 13 the upper portion of which is tapered, as at a, and extends through slot 5 in the table, to a point above the surface of the table, and each is provided with a cylindrical or pulley section, as at b, in line with the belt 9.

A spring 14 surrounds each of the members H and attached at its ends to bracket 10 and arm 12 tends to hold the pulley portion In of the spindle l3 against the belt 9, which if the belt be driven effects drive of the spindle.

To the upper ends of the spindles I3 any desired device for grinding or polishing, or other operation, as a wrap of steel wool IS, a grinding wheel l6, may be removably applied.

As will now be apparent, if'the' .belt 9 be driven the several spindles [3 will be driven due to the action of spring M in pressing the pulley sections b of the spindles against the belt.

If now an operator desires to grind a piece of work, any given spindle, which is but loosely driven since the spring M is of no great strength, is readily manually withdrawn from its seat 5 out of driving relationwith the belt. A grinding wheel I6 is applied to the spindle and it is released into driving relation with the belt. The operator then applies the work to the rotating grinding wheel and exerts such pressure upon the work as will press the pulley section of the spindle against the belt to give a suitable grinding speed.

As will be clear, any spindle can be operated for any given operation or taken out of operation independently of any other spindle and without shutting down the source of power.

When for any reason it is desired to have a spindle out of operation for any considerable length of time, it may be drawn away from the belt into the enlarged end portion of the slot 5 where it will be held as by a detent.

, During the operation of the tool described suction will be on duct 4 for the withdrawal of dust through slot 3 from the point of grinding or other operation.

It will be appreciated that various modifications of the embodiment of this invention described in detail above may be made without departing from the scope of the appended claims.

belt whereby the spindles will be driven} said spindles respectively being movable in said slots ontheir pivotal mountings to engage and disengage said pulley elements with respect to said belt. 7

2. A power driven tool of the character de-' scribed comprising a table, a plurality'of arcwate slots spaced longitudinally adjacent to and extending inwardly from an edge of said table, an endless belt guided to run edgewise beneath said table, means to drive said belt, a spindle for the reception of a working element extending through each of said slots, pivotal mountings for said spindles supported beneath the table, and pulley elements carried by said spindles for engagement with said belt whereby the spindles will be driven, said spindles respectively being movable in said arcuate slots on their pivotal mountings to engage and disengage said pulley elements with respect to said belt. I

3. A power driven tool of the character described comprising a table, a plurality of slots spaced longitudinally adjacent to and extending inwardly from an edge of said table, said slots being enlarged at their ends adjacent the edge of said table, an endless belt guided to run edgewise beneath said table, means to drive said belt, a spindle for the reception of a working element extending through each of said slots, pivotal mountings for said spindles supported beneath the'table, and pulley elements carried by said spindles for engagement. with said belt whereby the spindles will be driven, said spindles respectively being movable in said slots on their pivotal mountings to engage and disengage said pulley elements with respect to said belt.

4. A power driven tool of the character described comprising a table, a plurality of slots spaced longitudinally djacent to and extending inwardly from. an edge of said table, an endless belt guided to run edgewise beneath said table, means to drive said'belt, a spindle for the reception of a working element extending through each of said slots, pivotal mountings for said spindles supported beneath the table, pulley elements carried by said spindles for engagement with said .beltwhereby the spindles will be driven, said spindles respectively being movable insaid slots on their pivotal mountings to engage and disengage said pulley elements with respect to said belt, and springs operative on said spindles whereby the pulley elements carried thereby will be normally held in a driving relation with said belt.

5. A power driven tool of the character described comprising a table, a plurality of arcuate slots spaced longitudinally adjacent to and ex tending inwardly from the opposite side edges of said table, a. duct opening through the top of said table and extending longitudinally beneath said table intermediate its side edges, means to Withdraw air from said duct, an endless belt guided to. run edgewise beneath said table, means to drive said belt, a spindle for the reception of a working element extending through each of said slots, pivotal mountings for said spindles supported beneath the table, pulley elements carried by said spindles for engagement with said belt whereby the spindles will be driven, said spindles respectively being movable in said arouate slots on their pivotal mountings to engage and disengage said pulley elements with-respect to said belt, and springs operative on said spindles whereby the pulley elements carried thereby will be normally held in a driving relation with said belt.

CARL s. SCI-ILENZIG. Q 

